A spinning Firefox logo. This is an aPNG example. As you know PNG images were lacking animation. But with Firefox 3 and aPNG you can know create animations with PNGs. Here a small but beautiful example. Watch out, it is not a GIF but PNG. Even it seems to have a black background actually it does not. Optimised for 1024x768 screen resolutions but it will look good on other resolutions, too. Drag it onto the middle of the screen if you need.

I think that it's really good not because of the graphics or the picture, but because it is really simple and yet it makes me want to keep on staring at it, watching it spin and spin and spin and spin and spin...